NEC XM29 Plus not powering on

[SePh1r0tH]

Soooo a few days ago I turned on my NEC XM29 while having a lot of other electronics running off the same surge protector and I saw some sparks fly lol.

The monitor now will not power on fully. The fans do not start and you can hear 3 clicks coming from somewhere inside whenever I try to power it up.

The red standby light is on and solid (no blinking or anything)

I opened it up and checked the fuse for the power supply...still good.

Any ideas what else I could check out?

Thanks!
Dave

[kamiboy]

I believe I read somewhere that the XM monitors will not turn on if there is something wrong with the fan.

[ryu]

I believe I read somewhere that the XM monitors will not turn on if there is something wrong with the fan.

yep. you need to replace the existing fans with identical ones though

[SePh1r0tH]

Ahh thanks, I read that in the manual as well. However it says that if there is a fan issue the red standby light would blink every second. I think it is some kind of power failure. The fans seem fine..but I could be wrong.

[ryu]

if it was a serious issue with the psu, i think you wouldn't even be getting any clicking and the power led's color...

actually, you've made sure you're using the correct input, yes? iirc the necs click like that whenever you switch around inputs.

[SePh1r0tH]

Yea I've been using my 2 NEC monitors for a few years now, I'll try finding a replacement fan. It may be a problem with one of the relays for the psu, I'm going to try to clean them up a bit. It's not the same clicking noise when switching inputs. Thanks for all the tips!

[svensonson]

Yea I've been using my 2 NEC monitors for a few years now, I'll try finding a replacement fan. It may be a problem with one of the relays for the psu, I'm going to try to clean them up a bit. It's not the same clicking noise when switching inputs. Thanks for all the tips!

I am having exactly the same Problem with my XM29.

were you able to fix it somehow?

thanks for you help

[RGB0b]

The EXACT same thing happened to my XM29 about two years ago. I had an authorized repair shop in NYC fix it and it worked fine until recently, when the same thing happened again. The repair cost about $250, but on the work order, it seemed like they only replaced 5 parts:

FMQG5G Damper Diode - Qty = 1

J306 Transistor - Qty = 2

2SC5144 Transistor - Qty = 2

Would anyone know where to find these components inside the monitor? Also, does anyone have an idea what's causing the problem? I'd love to get this permanently repaired, as well as do a full cap replacement and calibration. I plan on keeping this monitor forever, so I'd like it to last.

[Rochabian]

I come back on this forum to share a solution for loud fan and their replacement on a NEC XM29+
After searching many ways to do it, here's a simple solution :
You have to connect the sensor of each of the three fan to the ground.
So connect the 3 yellow wires coming from the board to the ground and you can use any fan for replacement

Hope it helps preserving this amazing CRT!!!

[flynnsbit]

I come back on this forum to share a solution for loud fan and their replacement on a NEC XM29+
After searching many ways to do it, here's a simple solution :
You have to connect the sensor of each of the three fan to the ground.
So connect the 3 yellow wires coming from the board to the ground and you can use any fan for replacement

Hope it helps preserving this amazing CRT!!!

Good stuff! I am going to try on my XP.

[Rochabian]

I've replaced the three fans with standard PC 12V fan but they are powered in 5V instead of 12V by an external power supply to reduce RPM and noise

Sorry for the scheme, if someone can do it better
This monitor has never been so quiet!!!!!!!!
You can also reuse the 12V original wires and you can put a 1Kohm potentiometer between 12V and fans to control their speed